CODEWITHSUNDEEP
iosxamarinxamarin.iosxamarin.android
James Mallon
James Mallon

Reputation: 1127

Navigate from Xamarin Forms to Xamarin Native

My problem is that I require the first pages of my app to be Native. I need a way to Navigate from a Xamarin Forms Content Page to the first native pages of the app when a user signs out. Is there anyway of from a Forms page starting a native ViewController (iOS) or starting an Activity (Android). I use custom renderers regularly.

It would be brilliant if I could somehow restart the app or call AppDelegate again or something.

Any help is appreciated.

Upvotes: 1

Views: 757

Answers (1)

Grace Feng
Grace Feng

Reputation: 16652

If you use custom renderers regularly, then you can create a custom view renderer like this. For example:

In PCL:

public class NewView : View
{
}

In Android platform, create a layout under /Resources/layout first like this:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
  <TextView android:id="@+id/tv"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:text="this is new view." />
  <Button android:id="@+id/btn"
          android:layout_height="wrap_content"
          android:layout_width="match_parent"
          android:text="change text" />
</LinearLayout>

Then create the renderer for NewView like this:

public class NewViewRenderer : ViewRenderer
{
    private TextView tv;
    private Android.Widget.Button btn;

    protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.View> e)
    {
        base.OnElementChanged(e);
        if (Control == null)
        {
            var context = Xamarin.Forms.Forms.Context;
            LayoutInflater minflater = context.GetSystemService(Context.LayoutInflaterService) as LayoutInflater;
            var view = minflater.Inflate(Resource.Layout.newview, this, false);
            tv = view.FindViewById<TextView>(Resource.Id.tv);
            btn = view.FindViewById<Android.Widget.Button>(Resource.Id.btn);
            SetNativeControl(view);
        }

        if (e.OldElement != null)
        {
            btn.Click -= Btn_Click;
        }

        if (e.NewElement != null)
        {
            btn.Click += Btn_Click;
        }
    }

    private void Btn_Click(object sender, EventArgs e)
    {
        tv.Text = "Text changed!";
    }
}

Finally use this view in ContentPage to make it like a page:

<ContentPage.Content>
    <local:NewView />
</ContentPage.Content>

For iOS platform, there should be a method to set the ViewController as native control for a view renderer. But I'm not familiar with iOS, you may give a try.

Upvotes: 3

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